KR20100106908A - Method of filling ink and method of manufacturing color filter - Google Patents

Abstract

PURPOSE: An ink filling method and a color filter manufacturing method are provided to restrain the occurrence of wrinkle on the top of ink without causing the deterioration of productivity. CONSTITUTION: A layered body laminated with ink layers is formed on the droplet area. The droplet area is surrounded by a separate wall(40) on a transparent substrate. The hardening speed drops slowly starting from the bottom layer to the top layer. The is hardened in response to the photo energy due to the ultraviolet ray.

Description

Ink liquid filling method and color filter manufacturing method {METHOD OF FILLING INK AND METHOD OF MANUFACTURING COLOR FILTER}

The present invention relates to an ink liquid filling method and a color filter manufacturing method.

A color filter is used for a color liquid crystal display, an organic electroluminescent display, etc. The color filter relatively scans an inkjet head having nozzle holes and a transparent substrate in which concave element formation regions surrounded by partitions are arranged in a plurality of matrices, and ink droplets containing ink liquid containing pigments such as pigments and dyes. The ink solution pools are formed in the element formation region by attacking the element formation region from the nozzle holes, and the transparent substrate is produced by firing including the ink solution pools in the element formation region.

However, in the manufacturing method as described above, wrinkles may be generated on the upper surface of the ink liquid pool in the firing step so as to affect the optical properties of the color filter. Before the corrugation enters the firing process, when the fluidity of the ink solution pool in the element formation region is higher than that of the upper surface, the upper surface side of the ink substrate is hardened. It is known that it is easy to occur when there is.

As a technique for suppressing wrinkle generation, a technique described in JP-A 9-230132 (Patent Document 1) is known. When manufacturing a color filter, this technique apply | coats the coating material which disperse | distributed the pigment to ultraviolet curable resin on the surface of a transparent glass substrate, and irradiates an ultraviolet-ray from the back surface of a transparent glass substrate with respect to the coating material on a transparent glass substrate before a baking process. By irradiating, it is a technique which does not produce a wrinkle on the surface of a coating material in a baking process.

Therefore, by using the technique of patent document 1, the generation | occurrence | production of the upper surface of the ink liquid pool of the element formation area | region in a baking process can be suppressed.

However, when the technique described in Patent Literature 1 is used, since ultraviolet rays are irradiated to the ink liquid pool through the glass having the property of significantly increasing the absorption coefficient in the wavelength range of the ultraviolet ray, the ultraviolet light is directly irradiated to the ink liquid pool. In comparison with the case, there was a problem that the irradiation time is long, resulting in a significant decrease in productivity. In addition, plastic may be employed as the material of the transparent substrate, but since the extinction coefficient of the plastic increases more than glass in the wavelength range of ultraviolet rays, the productivity is further lowered.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an ink liquid filling method and a color filter manufacturing method which can suppress the occurrence of wrinkles on the upper surface of the ink liquid pool without causing a significant decrease in productivity.

In order to achieve the above object, the ink liquid filling method of Embodiment 1 is characterized in that a specific energy is formed in a region surrounded by a partition on a recording medium such that a laminate in which the ink liquid layer is laminated is formed so that the curing speed is gradually lowered from layer to layer toward the upper layer. It is to fill the ink liquid to be cured in response to.

According to the ink liquid filling method of Embodiment 1, an ink that is cured in response to a specific energy so that a laminate in which an ink liquid layer is laminated is formed in a region enclosed by a partition on a recording medium so that the curing speed is gradually lowered from layer to layer toward the upper layer. Since the liquid is filled, by applying a specific energy to the laminate, it is possible to advance the curing of the lower ink liquid layer than the upper ink liquid layer, and as a result, the upper surface of the ink liquid pool without causing a significant decrease in productivity. The occurrence of wrinkles can be suppressed.

Moreover, the ink liquid filling method of aspect 1 is an aspect 2 in which the said ink liquid contains the hardening accelerator by which hardening is accelerated in response to the said specific energy, and the said laminated body contains content of the said hardening accelerator from the lower layer. The ink liquid layers may be laminated so as to gradually decrease in units of layers toward the upper layer. Thereby, hardening of the ink liquid layer of a lower layer rather than an upper ink liquid layer can be advanced easily.

Moreover, the ink liquid filling method of embodiment 2 is, as embodiment 3, at least one of the photocuring accelerator which hardens in response to light energy, and the thermosetting accelerator which hardens in response to heat energy is promoted by the said ink liquid. You may make it contain. Thereby, hardening of the ink liquid layer of a lower layer can be advanced more easily than the ink liquid layer of an upper layer.

Moreover, the ink liquid filling method of aspect 1 is an aspect 4 in which the said laminated body contains the 1st layer of the upper layer side, and the 2nd layer of the lower layer side, and the ink liquid of the said 1st layer is the said specific energy. A second curing accelerator containing a first curing accelerator in which curing is promoted in response to the ink solution of the second layer, wherein curing is promoted in response to the specific energy, and a curing promoting rate is faster than that of the first curing accelerator. You may contain it. Thereby, hardening of the ink liquid layer of a lower layer side rather than the ink liquid layer of an upper layer side can be advanced easily.

Moreover, the ink liquid filling method of embodiment 4 is, as embodiment 5, at least one of the photocuring accelerator which hardens in response to light energy, and the thermosetting accelerator which hardens in response to heat energy is promoted to the said ink liquid. You may make it contain. Thereby, hardening of the ink liquid layer of a lower layer side can be advanced more easily than the ink liquid layer of an upper layer side.

In any of the ink liquid filling methods in any of Embodiments 1 to 5, in Embodiment 6, the area is formed in a rectangular shape, the areas are arranged in a plurality of matrices on the recording medium, and the laminate is formed for each area. The ink liquid may be filled as much as possible. Thereby, the ink liquid distribution of each area | region on a recording medium can be made uniform.

Moreover, the ink liquid filling method in any one of the aspects 1-5 may be made into the aspect 7 which comprised the said partition with the liquid repellent material which splashes ink liquid. As a result, the ink liquid can be prevented from flowing out of the region beyond the partition wall.

On the other hand, in order to achieve the said objective, the color filter manufacturing method as aspect 8 makes the said recording medium a transparent substrate using the ink liquid filling method in any one of aspect 1-7.

Therefore, according to the color filter manufacturing method of this aspect, since it acts similarly to any one of the aspect 1-7, like the aspect 1-7, the wrinkle of the upper surface of an ink-liquid pool does not cause remarkable fall of productivity. It can suppress occurrence.

On the other hand, in order to achieve the above object, the color filter manufacturing method according to Embodiment 9 includes a step of filling an ink liquid containing a photocuring accelerator in which a curing is promoted in response to light energy in a region surrounded by a partition on a transparent substrate; A step of removing the solvent of the ink liquid filled in the region, and a step of overlapping and filling the ink liquid filled with the ink liquid having a smaller content of a photocuring accelerator than the ink liquid previously filled in the region with the ink liquid previously filled; And drying the ink liquid filled in the region, applying the optical energy to the ink liquid filled in the region, and the ink liquid filled the transparent substrate in the region. It is comprised including the process to make.

According to the color filter manufacturing method of aspect 9, the ink enclosed with the partition on the transparent substrate is filled with the ink liquid containing the photocuring accelerator which hardens in response to light energy, and the solvent of the ink liquid filled in the area is removed. And filled in the area with the ink solution filled with the ink solution filled with the previous ink liquid with less content of the photocuring accelerator than the ink liquid filled with the ink liquid, and dried the ink liquid filled in the region. Since light energy is applied to the ink liquid and the transparent substrate is baked including the ink liquid filled in the area, the specific energy is given to the ink liquid filled in the area, so that the ink liquid layer in the lower layer is lower than the ink liquid layer in the upper layer. Curing can be advanced, and as a result, generation | occurrence | production of the wrinkles of the upper surface of an ink liquid pool can be suppressed, without causing a remarkable fall of productivity.

Moreover, in order to achieve the said objective, the color filter manufacturing method as aspect 10 uses the ink liquid containing the hardening accelerator which responds at least one of light energy or heat energy to the area | region enclosed by the partition on a transparent substrate, and hardening is accelerated | stimulated. A step of filling, a step of removing a solvent of the ink liquid filled in the region, and curing in the region in response to at least one of light energy or thermal energy, and promoting curing than the ink liquid filled first Filling an ink liquid containing a curing accelerator which is slowed down first with an ink liquid filled therein, drying the ink liquid filled in the area, and light or thermal energy in the ink liquid filled in the area. And a step of applying at least one of the steps, and baking the transparent substrate including the ink liquid filled in the region. It is made.

According to the color filter manufacturing method of the aspect 10, hardening of the ink liquid layer of a lower layer can be advanced rather than an upper ink liquid layer, and as a result, the generation | occurrence | production of the upper surface of an ink liquid pool can be suppressed, without causing a remarkable fall of productivity. have.

According to the ink liquid filling method and the color filter manufacturing method of the aspect of this invention, the effect which can suppress the generation | occurrence | production of the upper surface of an ink liquid pool without incurring a remarkable fall of productivity is acquired.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the principal structure of the inkjet recording apparatus which concerns on embodiment.
2 is a cross-sectional view showing a three-dimensional structure of one droplet ejection element in the inkjet recording apparatus according to the embodiment.
3 is a view showing the configuration of the side on which the ink droplets on the transparent substrate according to the embodiment are hit;
Fig. 4 is a block diagram showing a main configuration of an electric system of the inkjet recording apparatus according to the embodiment.
5 is a flowchart showing a flow of a process of an inertial control processing program according to the embodiment;
Fig. 6 is a sectional view seen from the side showing an example of a state of high sensitivity ink filled in the batting area 42;
Fig. 7 is a sectional view seen from the side showing an example of a state in which the solvent of the high sensitivity ink filled in the batting area 42 is removed.
FIG. 8 is a cross-sectional view when viewed from the side showing an example of a laminated body state formed in the battering area 42. FIG.
9 shows another example of an alternative form of ink.

EMBODIMENT OF THE INVENTION Hereinafter, the best form for implementing this invention with reference to drawings is demonstrated in detail. In addition, in this embodiment, the case where a color filter is manufactured by filling ink liquid (henceforth simply "ink" hereafter) by the ink liquid filling method of this invention from an inkjet recording apparatus using an inkjet recording apparatus is an example. Listen and explain.

FIG. 1 is a configuration diagram showing a main configuration of an inkjet recording apparatus 10 according to the present embodiment. As shown in FIG. 1, the inkjet recording apparatus 10 includes a red (R) high-sensitivity ink (detailed later) and a low-sensitivity ink (detailed later), a green (G) high-sensitivity ink and a low-sensitivity ink, blue A plurality of inkjet recording heads (hereinafter referred to as heads) 12 formed corresponding to each of the ink of the high sensitivity ink and the low sensitivity ink of (B) and discharging the corresponding ink drops, and a transparent substrate 14 as a recording medium. ) Is mounted on the mounting table 16 and the head 12, and a motor generating power for moving the head 12 along the arrow direction (hereinafter also referred to as "scanning direction") in FIG. 1 ( 18) is configured to include. In addition, when it is not necessary to distinguish a high sensitivity ink and a low sensitivity ink hereafter, it is simply called "ink".

The head 12 is provided with the nozzle 12A which is a discharge port which discharges ink droplets, and the ink chamber unit (droplet discharge element) 20 which consists of a pressure chamber etc. corresponding to the nozzle 12A. Moreover, the mounting table 16 is equipped with the mechanism (not shown) which fixes the transparent substrate 14 used as a base of a color filter to a reference position. In addition, in FIG. 1, only one head 12 is shown in order to avoid a landing.

Here, the ink which concerns on this embodiment is demonstrated. The ink which concerns on this embodiment is dye ink containing a photoinitiator. The dye ink of R which concerns on this embodiment is cyclohexanone (made by Wako Pure Chemical Co., Ltd.) as an organic solvent (solvent), DPCA-60 (made by Nippon Kayaku Co., Ltd.) as a monomer, and KF-353 (made by Shin-Etsu Silicone Co., Ltd.) as surfactant. And dye are used, and mass ratio is prepared so that it may become organic solvent: monomer: surfactant: dye = 69.95: 20: 0.05: 10. Moreover, G dye ink which concerns on this embodiment is cyclohexanone (made by Wako Pure Chemical Co., Ltd.), DCHMA (made by Tokyo Chemical Co., Ltd.), and DPCA-60 (made by Nippon Kayaku Co., Ltd.) as an organic solvent (solvent), KF-353 (manufactured by Shin-Etsu Silicone Co., Ltd.) and a dye are used as the surfactant, and the mass ratio is an organic solvent (cyclohexanone): an organic solvent (DCHMA): a monomer: a surfactant: a dye = 80.83: 0.7: 10.35: 0.05 : It is prepared so that it may be 8.07. Moreover, the dye ink of B which concerns on this embodiment is cyclohexanone (made by Wako Pure Chemical Co., Ltd.) as a solvent, DPCA-60 (made by Nippon Kayaku Co., Ltd.) as a monomer, and KF-353 (Shin-Etsu as a surfactant). Silicone company) and dye are used, and mass ratio is prepared so that it may become cyclohexanone (organic solvent): monomer: surfactant: dye = 62.95: 27: 0.05: 10.

As a photoinitiator contained in the ink which concerns on this embodiment, although the photoinitiation type which advances superposition | polymerization continuously by applying a radical (free group) by cleaving self chemical bonds in response to light is applied, it is not limited to this. Rather, you may apply the thing of the hydrogen drawing type which produces | generates a radical by extracting hydrogen in the monomer to photopolymerize. In addition, in this embodiment, although the following compound (1) is applied as a photoinitiator, it is not limited to this, For example, you may apply the following compound (2).

As mentioned above, since the ink which concerns on this embodiment is comprised containing the photoinitiator, hardening of an ink is accelerated when light is irradiated. High-sensitivity ink is ink whose curing speed is faster than low-sensitivity ink. That is, the high sensitivity ink and the low sensitivity ink are prepared so that the content of the photopolymerization initiator is higher than that of the low sensitivity ink so as to increase the sensitivity (for example, the photopolymerization initiator of the high sensitivity ink: the photopolymerization initiator of the low sensitivity ink = 5: 1). It is.

FIG. 2: is sectional drawing which shows the three-dimensional structure of one droplet discharge element (liquid chamber unit corresponding to one nozzle 12A) 20. As shown in FIG. As shown in FIG. 2, in the pressure chamber 22 formed corresponding to the nozzle 12A, the planar shape becomes substantially square, and the outlet to the nozzle 12A is formed in one corner of both corner parts on a diagonal line, On the other hand, an inlet (supply port) 24 for supply ink is formed. In addition to the above, the shape of the pressure chamber 22 may have various shapes such as polygons (round lozenges, rectangles, etc.), pentagons, hexagons, other polygons, circles, ellipses, etc., in addition to the above-mentioned planes.

The pressure chamber 22 communicates with the flow path 26 through the supply port 24. The flow path 26 is in communication with an ink tank (not shown) as an ink supply source, and ink supplied from the ink tank is supplied to the pressure chamber 22 through the flow path 26.

An actuator 32 having individual electrodes 30 is provided on a pressure plate (a diaphragm used as a common electrode) that forms part of a surface of the pressure chamber 22 (a ceiling surface in FIG. 2). It is joined. By applying a driving voltage between the individual electrode 30 and the common electrode, the actuator 32 is deformed to change the volume of the pressure chamber 22, and ink droplets are ejected from the nozzle 12A by the pressure change. As the actuator 32, a piezoelectric element using a piezoelectric body such as lead zirconate titanate or barium titanate is preferably used. After the ejection of the ink, when the displacement of the actuator 32 returns to its original state, the new ink is refilled into the pressure chamber 22 from the flow path 26 through the supply port 24.

Therefore, in the inkjet recording apparatus 10 according to the present embodiment, the droplets are ejected from the nozzle 12A by controlling the driving of the actuator 32 corresponding to the nozzle 12A in accordance with the dot arrangement data generated from the image information. You can.

3 is a diagram showing the configuration of the side on which the ink droplets on the transparent substrate 14 are attacked. As shown in FIG. 3, on the transparent board | substrate 14, it is divided into the rectangular inertia area | region 42 in the several plane view enclosed by the partition 40, and formed in concave shape, and the said inversion area | region 42 is transparent It is arrange | positioned on the board | substrate 14 in plural matrix form. The target area 42 finally constitutes the pixel of the color filter by filling the ink with the inkjet recording apparatus 10, and the scanning direction is in the long side direction, and the direction perpendicular to the scanning direction is in the short side direction. It is. In addition, in this embodiment, although the transparent glass substrate is applied as the transparent substrate 14, it is not limited to this, An acrylic glass, a plastic substrate, and a plastic film can also be applied. In addition, in this embodiment, although the thickness of the partition 40 is 2 micrometers, the length of the longitudinal direction of the strike area | region 42 is 320 micrometers, and the length of the short side direction of the hitting area 42 is 90 micrometers, However, these The value can be changed as appropriate. In addition, in this embodiment, the partition 40 is comprised by resin (for example, black resin) which does not have light transmissivity. Thus, it is preferable that the partition 40 does not have the translucency comprised with the liquid repellent material which splashes ink.

4 is a block diagram showing a main configuration of an electric system of the inkjet recording apparatus 10 according to the present embodiment. As shown in FIG. 4, the inkjet recording apparatus 10 includes a head 12, a motor 18, a communication interface 50, a system controller 52, an image memory 54, and a ROM (Read Only Memory) ( 56), the motor driver 58, and the print control part 60 are comprised.

The communication interface 50, the image memory 54, the ROM 56, the motor driver 58, and the print control unit 60 are connected to the system controller 52.

The communication interface 50 is an interface unit with the host apparatus 62 used for the user to give an instruction of drawing or the like to the inkjet recording apparatus 10. As the communication interface 50, a serial interface such as USB (Universal Serial Bus), IEEE 1394, Ethernet (registered trademark), a wireless network, or a parallel interface such as Centronics can be applied. This portion may be equipped with a buffer memory (not shown) for speeding up communication.

Image information indicating an image to be formed on the transparent substrate 14, sent from the host device 62, is input to the inkjet recording apparatus 10 via the communication interface 50, and is once stored in the image memory 54. . The image memory 54 is a storage means for storing image information input through the communication interface 50, and reads and writes data through the system controller 52. The image memory 54 is not limited to a memory made of a semiconductor element, and a magnetic medium such as a hard disk may be used.

The system controller 52 is composed of a CPU (central arithmetic processing unit), a peripheral circuit, and the like, and functions as a control device for controlling the entire inkjet recording apparatus 10 in accordance with a predetermined program. It functions as a computing device to perform. That is, the system controller 52 controls each part of the communication interface 50, the image memory 54, the ROM 56, the motor driver 58, the print control part 60, etc., and between the host apparatus 62, Communication control, read / write control of the image memory 54 and the ROM 56, and the like, and a control signal for controlling the driving of the motor 18 is generated. In addition to the control signal, the print control unit 60 also transmits image information stored in the image memory 54.

The ROM 56 also stores programs executed by the system controller 52 and various data necessary for control. The ROM 56 may be a non-rewritable storage means. However, when updating various data as necessary, it is preferable to use rewritable storage means such as EEPROM.

The image memory 54 is used as a temporary storage area of image information, and is also used as a development area of a program and an arithmetic work area of the system controller 52.

The motor driver 58 is a driver (drive circuit) which drives the motor 18 according to the instruction from the system controller 52. The print control unit 60 functions as signal processing means for performing various processing, correction, and the like for generating a discharge control signal from the image information transmitted from the system controller 52 under the control of the system controller 52. In addition, the ejection driving of the head 12 is controlled based on the generated droplet ejection data.

Next, the manufacturing process of a color filter is demonstrated.

Production of a color filter is performed according to the processes 1-4 shown below.

Step 1; Ink is filled in the whole strike area 42 to form an ink pool in each strike area 42.

Step 2; Drying the ink pools in the target area 42 (hereinafter also referred to as "prebaking").

Process 3; Light is irradiated to the ink pool of the target area | region 42. FIG.

Process 4; The transparent substrate 14 is baked (hereinafter also referred to as "post bake").

First, the process 1 (the process of filling ink in the whole battering area | region 42 and forming ink pool in each batting area | region 42) is demonstrated.

In the inkjet recording apparatus 10 according to the present embodiment, in order to form the pixel of the color filter when an instruction to start the production of the color filter is input, first, with respect to each of the target regions 42 on the transparent substrate 14, The inertia control process of injecting ink droplets is performed so that ink pooling may be formed in the inertia area 42.

Hereinafter, with reference to FIG. 5, the operation of the inkjet recording apparatus 10 at the time of the above-described control process will be described. 5 is a flowchart showing the flow of the processing of the other control processing program executed by the system controller 52 at that time, and the program is previously stored in the predetermined area of the ROM 56.

In step 100 of FIG. 5, the head 12 drives the motor 18 to move a predetermined path at a predetermined speed. In the next step 102, the nozzle 12A waits until it reaches the other starting position of the high sensitivity ink (here, the position opposite to the other area 42 in which the high sensitivity ink is not), and then proceeds to step 104. Then, the head 12 is controlled to discharge high-sensitivity ink as ink droplets from the nozzle 12A.

In the next step 106, after waiting until the number of strokes of the high-sensitivity ink reaches a predetermined number (here, the number of strokes such that the high-sensitivity ink becomes the state shown in FIG. 6 as an example in the other area 42), and then step 108 The head 12 is controlled to stop the discharge of the highly sensitive ink. As a result, the head 12 stops the discharge of the highly sensitive ink.

In the next step 110, it is determined whether or not the processes of steps 104 to 108 have been performed for the whole attack area 42, and if a negative determination is made, the process returns to step 102; Go to

In step 112, the apparatus waits until a predetermined time elapses (in this case, the time until the high-sensitivity ink of the other area 42 is dried to become a state shown in FIG. 7 as an example). Thereby, since the solvent of the highly sensitive ink filled in the other area | region 42 evaporates to some extent, even if the low sensitivity ink is overlapped and filled later, the density | concentration of the photoinitiator of a high sensitivity ink and a low sensitivity ink is not uniform. In addition, in this embodiment, although the solvent of the highly sensitive ink filled in the other area | region 42 is evaporated by natural drying, it is not limited to this, Even if it enforces drying using a hotplate, a furnace, etc., do.

In the next step 114, the nozzle 12A waits until it reaches the other starting position of the low-sensitivity ink (here, the position opposite to the other area 42 in which the low-sensitivity ink is not), and then the step 116 Subsequently, the head 12 is controlled to discharge low-sensitivity ink as ink droplets from the nozzle 12A.

In the next step 118, the waiting number of the low-sensitivity ink is waited until the predetermined number (here, the enough number of the low-sensitivity ink becomes the state shown in FIG. 8 as an example in the other region 42), The flow advances to step 120, and the head 12 is controlled to stop the discharge of the low sensitivity ink. As a result, the head 12 stops discharging the ink of the low sensitivity.

In the next step 122, it is determined whether or not the processes of steps 116 to 120 have been performed for the whole attack area 42, and if the negative determination is made, the process returns to step 114; End the control processing program.

In this way, by the system controller 52, the control control program is executed, so that the whole control area 42 is, as an example, shown in FIG. 8 as the high sensitivity ink layer 65A and the low sensitivity ink layer 65B. The laminated body 65 as an ink pool which consists of is formed.

Thus, after the laminated body 65 is formed in the whole battering area | region 42, said process 2 is performed. In the process 2, the transparent substrate 14 including the laminated body 65 formed in the whole battering area | region 42 is left to stand for several minutes in the atmosphere of 100-130 degreeC, and most of the ink solvent is evaporated. In addition, in this embodiment, although the prebaking of the process 2 and the postbaking of the process 4 are performed by the atmospheric oven, it is not limited to this, You may carry out by a nitrogen substitution oven, a hotplate, etc.

In the next step 3, ultraviolet rays are irradiated from above on the laminate 65 of the transparent substrate 14. Thereby, superposition | polymerization and crosslinking of the monomer contained in ink advance, and the laminated body 65 hardens. At this time, hardening of the high sensitivity ink layer 65A is accelerated | stimulated rather than the low sensitivity ink layer 65B.

In the following process 4, the transparent substrate 14 is baked by leaving it for about 30 minutes in the atmosphere which is 200-230 degreeC including the laminated body 65 formed in the whole battering area | region 42. FIG. At this time, since hardening of the high-sensitivity ink layer 65A located below the low-sensitivity ink layer 65B advances rather than hardening of the low-sensitivity ink layer 65B, the upper surface of the laminated body 65 (low sensitivity ink) The upper surface of the layer 65B) is less likely to wrinkle.

In addition, by producing a color filter in combination with photocuring and thermosetting as described above, the curing ability of the ink pool (laminate 65) constituting each pixel is increased, and the chemical resistance, heat resistance, light resistance, and weather resistance are enhanced. There is a number. In particular, since the ink resistance using a dye like this embodiment may be inferior to chemical resistance than the ink using a pigment, it is effective to use photocuring and thermal curing together.

As explained above in detail, according to the manufacturing method of the color filter which concerns on this embodiment, the hardening rate is layer by layer from the lower layer to the upper layer in the other area | region 42 surrounded by the partition 40 on the transparent substrate 14. It is cured in response to a specific energy (here, light energy due to ultraviolet rays) so that a laminate 65 in which an ink liquid layer (here, high-sensitivity ink layer 65A and low-sensitivity ink layer 65B) is laminated is formed so as to gradually slow down. Since the ink is filled, hardening of the ink liquid layer (here, high-sensitivity ink layer 65A) lower than the upper ink liquid layer (here, the low-sensitivity ink layer 65B) can proceed, resulting in remarkable productivity. It is possible to suppress the occurrence of wrinkles on the upper surface of the ink pool (in this case, the upper surface of the laminate 65) without causing any deterioration.

Moreover, according to the manufacturing method of the color filter which concerns on this embodiment, the ink contains the hardening accelerator (here, a photoinitiator) in which hardening is promoted in response to specific energy, and the laminated body 65 is a Since the ink liquid layers are laminated so that the content gradually decreases in units of layers from the lower layer to the upper layer, curing of the ink liquid layer in the lower layer can be easily carried out than the ink liquid layer in the upper layer.

Moreover, according to the manufacturing method of the color filter which concerns on this embodiment, the other area | region 42 is arrange | positioned on the transparent substrate 14 in multiple matrix form, with the other area | region 42 as a rectangular shape, and the other area | region 42 Since the ink is filled so that the laminated body 65 is formed in every), a color filter with a uniform ink distribution can be manufactured.

Moreover, according to the manufacturing method of the color filter which concerns on this embodiment, since the partition 40 is comprised by the liquid repellent material which splashes ink, it is suppressed that ink flows out of the other area 42 beyond the partition 40. can do.

In the above embodiment, a plurality of ink droplets are discharged to the target area 42 by one nozzle 12A, but the present invention is not limited thereto, and as shown in FIG. 9 as an example, each of the ink droplets is discharged. The line head 70 having the plurality of nozzles 70A may be inclined by a predetermined angle θ that is not orthogonal to the scanning direction so as to perform one-pass scanning on the other area 42. This can improve productivity.

Moreover, in the said embodiment, although the case where each of the high sensitivity ink and the low sensitivity ink contains compound (1) as a photoinitiator was demonstrated, this invention is not limited to this, The compound as a photoinitiator which a high sensitivity ink contains is a compound. Instead of (1), you may apply the compound more reactive than compound (1). Moreover, the following compound (3) can be illustrated as a compound more reactive than compound (1) as a photoinitiator.

Moreover, in the said embodiment, you may make the ink contain the photosensitizer which consists of a compound which expands the photosensitive wavelength range and uses light energy effectively, and raises the sensitivity of a photoinitiator. In this case, many photosensitizers are contained by a high sensitivity ink rather than a low sensitivity ink. As a photosensitizer, benzophenone, acetophenone, thioctoic acid, etc. can be illustrated.

Moreover, in the said embodiment, although the case where the ink contained the photoinitiator was demonstrated, this invention is not limited to this, The ink should just contain at least one of a photoinitiator and a thermal polymerization initiator. When using a thermal polymerization initiator, many thermal polymerization initiators are contained by a high sensitivity ink rather than a low sensitivity ink. By using the thermal polymerization initiator in this manner, the polymerization reaction of the ink can be promoted even during prebaking and postbaking. Moreover, as a thermal polymerization initiator, the organic peroxide represented by benzoyl peroxide (BPO) and the azo compound represented by azobisisobutylonitrile (AIBN) can be illustrated.

Moreover, in the said embodiment, although the form example at the time of configuring the laminated body 65 by the two layers of the high sensitivity ink layer 65A and the low sensitivity ink layer 65B was given and demonstrated, this invention is not limited to this. It is good also as a laminated body of three or more layers. In this case, it is set as the laminated body which laminated | stacked the ink layer so that hardening speed might become slow gradually by layer from lower layer to upper layer. Thereby, the same or more effect than the said embodiment can be expected.

Moreover, in the said embodiment, although the example of the form at the time of ejecting ink droplets from the head 12, moving relative to the transparent board 14 and moving the head 12, was given and demonstrated, this invention is not limited to this, Example For example, ink droplets may be ejected from the head 12 while moving the transparent substrate 14 relative to the head 12, and ink from the head 12 while moving the head 12 and the transparent substrate 14 together. You may discharge a droplet. Thus, ink droplets may be ejected from the head 12 while relatively moving at least one of the head 12 and the transparent substrate 14.

In addition, in the said embodiment, although the case where the color filter was manufactured by discharging ink droplets to the transparent substrate 14 was demonstrated, this invention is not limited to this, The paper, board | plate material, sheet | seat material, etc. are used as a recording medium. The image may be recorded by filling the other area of the recording medium with the ink filling method of the present invention.

Claims (10)

An ink liquid filling method in which an ink liquid that is cured in response to a specific energy is filled in a region surrounded by a partition on a recording medium so that a stack in which an ink liquid layer is laminated is formed gradually so that the curing speed is gradually lowered layer by layer from the lower layer to the upper layer. The method of claim 1,
The ink liquid contains a curing accelerator in which curing is promoted in response to the specific energy,
An ink liquid filling method in which the laminate is formed by laminating the ink liquid layer such that the content of the curing accelerator gradually decreases in units of layers from the lower layer toward the upper layer. The method of claim 2,
An ink liquid filling method in which the ink liquid contains at least one of a photocuring accelerator for curing in response to light energy and a thermal curing accelerator for curing in response to heat energy. The method of claim 1,
The laminate includes at least a first layer on the upper layer side and a second layer on the lower layer side,
The ink solution of the first layer contains a first curing accelerator in which curing is promoted in response to the specific energy,
An ink liquid filling method according to claim 2, wherein the ink liquid of the second layer contains a second curing accelerator in which curing is promoted in response to the specific energy and the curing acceleration rate is faster than that of the first curing accelerator. The method of claim 4, wherein
An ink liquid filling method in which the ink liquid contains at least one of a photocuring accelerator for curing in response to light energy and a thermal curing accelerator for curing in response to heat energy. 6. The method according to any one of claims 1 to 5,
An ink liquid filling method in which the area is made rectangular and the areas are arranged in a plurality of matrices on the recording medium, and the ink liquid is filled so that the stack is formed for each of the areas. 6. The method according to any one of claims 1 to 5,
An ink liquid filling method, wherein the partition wall is formed of a liquid repellent material that splashes ink liquid. The color filter manufacturing method which made the said recording medium into a transparent substrate using the ink liquid filling method in any one of Claims 1-7. A step of filling an area surrounded by a partition on the transparent substrate with an ink liquid containing a photocuring accelerator which is cured in response to light energy;
Removing a solvent of the ink liquid filled in the region;
Filling the said ink liquid with less content of a photocuring accelerator than the said ink liquid previously filled with the said ink liquid previously filled, and
Drying the ink liquid filled in the region;
Applying the optical energy to the ink liquid filled in the region;
And baking the transparent substrate including the ink liquid filled in the region. Filling an ink liquid containing a curing accelerator which reacts with at least one of light energy or thermal energy in a region enclosed by a partition on the transparent substrate and promotes curing;
Removing the solvent of the ink liquid filled in the region;
The region is filled with an ink liquid containing a curing accelerator which reacts with at least one of light energy or thermal energy and promotes curing, and has a curing accelerator slower than the ink liquid previously filled with the ink liquid filled first. Process to do,
Drying the ink liquid filled in the region;
Applying at least one of light energy or thermal energy to the ink liquid filled in the region;
And baking the transparent substrate including the ink liquid filled in the region.

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